//need to fix
public bool IfObjectInFieldOfView(Ibounds ib, bool useBoundsCheck = false)
{
if ((ib.Transform.position - eye.position).sqrMagnitude > viewDistance * viewDistance)
{
return(false);
}
if (useBoundsCheck)
{
//1. Simple check if the center of object inside Field of View
if (Vector3.Angle(eye.forward, ib.Transform.position - eye.position) < viewAngle / 2)
{
return(true); //and then return.
}
//2. Advanced bounds checking
Vector3[] vertices = ib.Vertices;
float boundsHeight_1 = vertices[0].y - 0.1f; //get bounds height
Vector3 orginalPos_fixed = new Vector3(eye.position.x, boundsHeight_1, eye.position.z);
Vector3 forwardPos = eye.forward * viewDistance + eye.position;
Vector3 forwardPos_Fixed = new Vector3(forwardPos.x, boundsHeight_1, forwardPos.z) - orginalPos_fixed;
// check if we can directly get raycast from forward direction
if (Physics.Raycast(orginalPos_fixed, forwardPos_Fixed, viewDistance))
{
return(true);
}
else
{
//check if any vertices of the bounds inside view angle. if there is, we raycast the tow view edge
//if hit the collider. means we can see the bounds
foreach (Vector3 v in vertices)
{
//Check if corner inside the view angle
if (Vector3.Angle(forwardPos_Fixed, v - orginalPos_fixed) < viewAngle / 2.0f)
{
if (ScanFromViewEdge(orginalPos_fixed, forwardPos_Fixed, 5))
{
return(true);
}
}
}
}
return(false);
}
//Use simple object cnenter forward angle checking
else if (Vector3.Angle(eye.forward, ib.Transform.position - eye.position) < viewAngle / 2)
{
return(true);
}
return(false);
}
public void GetAllColliderInsideFieldOfView <T>(ref List <T> allColliderTInView, Action callBack, bool boundsRaycast = false) where T : MonoBehaviour
{
//get all Collider in a sphere
Collider[] allColliders = Physics.OverlapSphere(eye.position, viewDistance);
//get all Collider in View
foreach (Collider c in allColliders)
{
T t = c.GetComponent <T>();
if (t)
{
//1. if the t aready in side the List, we skipe
if (allColliderTInView.Contains(t))
{
continue;
}
//Debug.Log(Vector3.Angle(eye.forward, c.transform.position - eye.position));
if (boundsRaycast)
{
//2. Simple check if the center of object inside Field of View
if (Vector3.Angle(eye.forward, c.transform.position - eye.position) < viewAngle / 2)
{
allColliderTInView.Add(t);
callBack();
continue; //and then return.
}
Ibounds b = c.GetComponent <Ibounds>();
Vector3[] vertices = b.Vertices;
float boundsHeight_1 = b.Bounds.center.y; //get bounds height //instead of use a magic number. we should use bounds.center.y
Vector3 orginalPos_fixed = new Vector3(eye.position.x, boundsHeight_1, eye.position.z);
Vector3 forwardUnnormaledDir = eye.forward * viewDistance + eye.position;
Vector3 forwardUnnormaledDir_Fixed = new Vector3(forwardUnnormaledDir.x, boundsHeight_1, forwardUnnormaledDir.z) - orginalPos_fixed;
RaycastHit hitinfo;
//3. Raycast forward.
// check if we can directly get raycast from forward direction.
//for some very big object, for player to the center angle check may not work.
if (Physics.Raycast(orginalPos_fixed, forwardUnnormaledDir_Fixed, out hitinfo, viewDistance))
{
if (hitinfo.collider.gameObject == c.gameObject)
{
allColliderTInView.Add(t);
callBack();
continue;
}
}
else //4.Scan Field Of View
{
//check if any vertices of the bounds inside view angle. if there is, we raycast the tow view edge
//if hit the collider. means we can see the bounds
foreach (Vector3 v in vertices)
{
//Check if corner inside the view angle
if (Vector3.Angle(forwardUnnormaledDir_Fixed, v - orginalPos_fixed) < viewAngle / 2.0f)
{
if (ScanFromViewEdge(orginalPos_fixed, forwardUnnormaledDir_Fixed, 5))
{
allColliderTInView.Add(t);
callBack();
break;
}
}
}
}
}
//Dont use bounds raycast
else if (Vector3.Angle(eye.forward, c.transform.position - eye.position) < viewAngle / 2)
{
allColliderTInView.Add(t);
callBack();
}
}
}
}
